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  <title>Returns a timezone name by guessing from abbreviation and UTC offset</title>
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  <div id="layout-content"><div id="function.timezone-name-from-abbr" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">timezone_name_from_abbr</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.1.3, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">timezone_name_from_abbr</span> &mdash; <span class="dc-title">Returns a timezone name by guessing from abbreviation and UTC offset</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.timezone-name-from-abbr-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description"><span class="methodname"><strong>timezone_name_from_abbr</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$abbr</code></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$utcOffset</code><span class="initializer"> = -1</span></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$isDST</code><span class="initializer"> = -1</span></span>): <span class="type"><span class="type">string</span>|<span class="type"><span class="type false">false</span></span></span></div>

 </div>


 <div class="refsect1 parameters" id="refsect1-function.timezone-name-from-abbr-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">abbr</code></dt>

     <dd>

      <p class="para">
       Time zone abbreviation.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">utcOffset</code></dt>

     <dd>

      <p class="para">
       Offset from GMT in seconds. Defaults to -1 which means that first found
       time zone corresponding to <code class="parameter">abbr</code> is returned.
       Otherwise exact offset is searched and only if not found then the first
       time zone with any offset is returned.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">isDST</code></dt>

     <dd>

      <p class="para">
       Daylight saving time indicator. Defaults to -1, which means that
       whether the time zone has daylight saving or not is not taken into
       consideration when searching. If this is set to 1, then the
       <code class="parameter">utcOffset</code> is assumed to be an offset with
       daylight saving in effect; if 0, then <code class="parameter">utcOffset</code>
       is assumed to be an offset without daylight saving in effect. If
       <code class="parameter">abbr</code> doesn&#039;t exist then the time zone is
       searched solely by the <code class="parameter">utcOffset</code> and
       <code class="parameter">isDST</code>.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.timezone-name-from-abbr-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns time zone name on success 或者在失败时返回 <strong><code>false</code></strong>.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.timezone-name-from-abbr-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2114">
    <p><strong>示例 #1 A <span class="function"><strong>timezone_name_from_abbr()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">timezone_name_from_abbr</span><span style="color: #007700">(</span><span style="color: #DD0000">"CET"</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo&nbsp;</span><span style="color: #0000BB">timezone_name_from_abbr</span><span style="color: #007700">(</span><span style="color: #DD0000">""</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">3600</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Europe/Berlin
Europe/Paris
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.timezone-name-from-abbr-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.timezone-abbreviations-list.html" class="function" rel="rdfs-seeAlso">timezone_abbreviations_list()</a> - 别名 DateTimeZone::listAbbreviations</span></li>
   </ul>
  </p>
 </div>


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